模拟酸雨胁迫对4种草坪草种子萌发的影响

以中性溶液(pH =70)为对照，研究了模拟酸雨（pH 为20、25、30、35、40、50）胁迫对黑麦草(Lolium perenne)、高羊茅(Festuca arundinacea)、匍匐翦股颖(Agrostis palustris)和狗牙根(Cynodon dactylon)4种多年生草坪草种子萌发的影响。结果表明：酸雨胁迫对4种草坪草种子萌发的影响不同，pH=20的酸雨完全抑制了4种草坪草种子的萌发，表现为发芽率、发芽势、活力指数均为零。黑麦草、高羊茅种子能在pH≥25的酸雨胁迫下正常萌发，匍匐翦股颖种子能在pH≥30的酸雨胁迫下正常萌发，狗牙根种子在不同程度酸雨胁迫下均萌发不良。此外，酸雨胁迫还延缓了4种草坪草种子的萌发进程。应用主成分分析和隶属函数分析法对4种草坪草种子抗酸雨胁迫能力进行综合评定，得出4种草坪草种子抗酸雨胁迫能力由强到弱的顺序依次为高羊茅、黑麦草、匍匐翦股颖、狗牙根。

Effect of simulated acid rain stress on germination of four turf grass seeds

The seeds of Lolium perenne,Festuca arundinacea,Agrostis palustris and Cynodon dactylon were treated with simulated acid rain at pH 2.0,2.5,3.0,3.5,4.0,5.0 and 7.0(as control) to study the effects of acid rain on their germination.The results showed that the seeds germination of four turf grass under acid rain stress were affected at different levels.Acid rain intensity pH 2.0 completely inhibited the seed germination of turf grass,showing no germination was observed and germination energy and vigor index w...